static int save_keys(const char *pubfn, const char *privfn, DSA *dsa)
{
FILE *f;
LK_act_key(privfn, PEM_write_DSAPrivateKey(f, dsa, NULL, NULL, 0, NULL, NULL), "w",
"Could not open %s for writing!\n",
"Could not write DSA Private key to %s!\n");
if(privfn != NULL)
chmod(privfn, 0600);
LK_act_key(pubfn, PEM_write_DSA_PUBKEY(f, dsa), "w",
"Could not open %s for writing!\n",
"Could not write DSA public key to %s!\n");
return 0;
}
inline void dsa_key::write_private_key(file _file, cipher::cipher_algorithm algorithm, pem_passphrase_callback_type callback, void* callback_arg) const
{
error::throw_error_if_not(PEM_write_DSAPrivateKey(_file.raw(), ptr().get(), algorithm.raw(), NULL, 0, callback, callback_arg) != 0);
}
inline void dsa_key::write_private_key(file _file, cipher::cipher_algorithm algorithm, const void* passphrase, size_t passphrase_len) const
{
error::throw_error_if_not(PEM_write_DSAPrivateKey(_file.raw(), ptr().get(), algorithm.raw(), static_cast<unsigned char*>(const_cast<void*>(passphrase)), static_cast<int>(passphrase_len), NULL, NULL) != 0);
}
int CDSAKeyGenerator::Generate()
//Generate a DSA key with pre-determined length
{
unsigned char* pbSeed = NULL;
DSA* pDSAParams = NULL;
FILE* fp = NULL;
LPSTR pbPassword = NULL;
const _TCHAR* pPrivKeyFile = NULL;
int retVal = FAIL;
int retFunc = FAIL;
pPrivKeyFile = GetPrivateKeyFile();
if(!pPrivKeyFile)
{
PrintErrorInfo("Bad parameter error!", EGeneric, constparams);
return 0;
}
OPENSSL_add_all_algorithms_conf();
ERR_load_crypto_strings();
int dwKeyLength = 0;
dwKeyLength = GetKeyLength();
try
{
retVal = GenerateSeed(dwKeyLength, &pbSeed);
if(retVal != SUCCESS)
{
throw EMSCrypto;
}
//Generate DSA params (p,q and g)
_tprintf(_T("\nGenerating DSA key ."));
pDSAParams = DSA_generate_parameters(dwKeyLength, pbSeed, dwKeyLength, NULL, NULL, DSAKeyStatus, NULL);
if(!pDSAParams)
{
PrintErrorInfo("Error generating DSA key params!", EOPENSSL, constparams);
throw EOPENSSL;
}
//Generate DSA key
retVal = DSA_generate_key(pDSAParams);
if(!retVal)
{
PrintErrorInfo("DSA key generation failed!", EOPENSSL, constparams);
throw EOPENSSL;
}
_tprintf(_T("Generated!\n"));
//Create a key file
fp = _tfopen(pPrivKeyFile, _T("w"));
if(!fp)
{
PrintErrorInfo("Error creating key file!", EGeneric, constparams);
throw EOPENSSL;
}
//Write generated DSA key to the key file
if(m_bPassword)
{
DWORD len = 0;
len = _tcslen(GetPassword());
pbPassword = MakeMBCSString(GetPassword(), CP_UTF8, len);
retVal = PEM_write_DSAPrivateKey(fp, pDSAParams, EVP_des_ede3_cbc(), (unsigned char *) pbPassword, len, NULL, NULL);
delete pbPassword;
}
else if(m_bAsk)
{
retVal = PEM_write_DSAPrivateKey(fp, pDSAParams, EVP_des_ede3_cbc(), NULL, 0, NULL, NULL);
}
else
{
_tprintf(_T("\n"));
retVal = PEM_write_DSAPrivateKey(fp, pDSAParams, NULL , NULL, 0, NULL, NULL);
}
if(!retVal)
{
PrintErrorInfo("Error writing to key file", EOPENSSL, constparams);
throw EOPENSSL;
}
//Free variables
DSA_free(pDSAParams);
fclose(fp);
SYMBIAN_FREE_MEM(pbSeed);
//Get command prompt handle
HANDLE hndl = 0;
hndl = GetStdHandle(STD_OUTPUT_HANDLE);
_tprintf(_T("\nCreated key: "));
DWORD bytesWritten;
WriteConsole(hndl, pPrivKeyFile, wcslen(pPrivKeyFile), &bytesWritten, NULL);
retFunc = SUCCESS;
}
catch (...)
{
//Delete dsa params
if(pDSAParams)
{
DSA_free(pDSAParams);
}
if (fp)
{
fclose(fp);
}
SYMBIAN_FREE_MEM(pbSeed);
}
return retFunc;
}